[llvm] [mlir] [mlir][emitc] Arith to EmitC conversion: constants (PR #83798)

[Tina Jung via llvm-commits]

TinaAMD wrote:

> @TinaAMD let me know if I should hit the "Squash and merge" button for you.

Yes, that would be great.

https://github.com/llvm/llvm-project/pull/83798